decotacks Crystal Upholstery Nails/tacks 7/16" - 100 Pcs [#55 Black Diamond] DXC0611#55 Head Size : 7/16" (11mm) Shank Length : 5/8" (16mm) Made by high grade Acrylic Diamonds, Color : Black Diamond Mechanical Connection between Base & Diamond, No Glue Used!!! Need to use Pliers to catch nails before hammering, they are small and hammer them by free hand may be dangerous and cause shanks bending !!!